replace xnet.Transport by xnet.Pipe

observer/stats/wrapper/conn.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/go-gost/core/metadata"
 	"github.com/go-gost/core/observer/stats"
+	xio "github.com/go-gost/x/internal/io"
 	xnet "github.com/go-gost/x/internal/net"
 	"github.com/go-gost/x/internal/net/udp"
 )
@@ -89,6 +90,20 @@ func (c *conn) ClientAddr() net.Addr {
 	return nil
 }
 
+func (c *conn) CloseRead() error {
+	if sc, ok := c.Conn.(xio.CloseRead); ok {
+		return sc.CloseRead()
+	}
+	return nil
+}
+
+func (c *conn) CloseWrite() error {
+	if sc, ok := c.Conn.(xio.CloseWrite); ok {
+		return sc.CloseWrite()
+	}
+	return nil
+}
+
 type packetConn struct {
 	net.PacketConn
 	stats stats.Stats